Shield Essential-C Day Moisture SPF 30 - Vitamin C Moisturizer for Face

Did You Know? Chemical sunscreens (which are dermatologist approved) work by absorbing UV rays like a sponge, then converting them to heat to release them from your skin. How it Works Expert Tip Apply sunscreen generously before going outdoors. It takes approximately 15 minutes for your skin to absorb the sunscreen and protect you. If you wait until you are in the sun to apply sunscreen, your skin is unprotected and can burn.